声发射定位技术在锚杆拉拔脱黏实验教学中的应用  

Application of acoustic emission positioning technology in the teaching of bolt pulling and debonding experiments

作　　者：石浩 庄剑韬[1] 冯吉昊 宋雷 张后全 蔡海兵[1] 王国柱 安刚建[4] SHI Hao;ZHUANG Jiantao;FENG Jihao;SONG Lei;ZHANG Houquan;CAI Haibing;WANG Guozhu;AN Gangjian(School of Civil Engineering and Architecture,Anhui Universityof Science and Technology,Huainan 232001,China;State Key Laboratory for Geomechanics&Deep Underground Engineering,China University of Mining andTechnology,Xuzhou 221116,China;Petroleum Engineering Technology Research Institute,Sinopec Zhongyuan Oilfield Branch,Puyang 457001,China;The Fourth Engineering Co.Ltd.,China Railway No.4 Engineering Group Co.Ltd.,Hefei 230041,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [3]中国石化中原油田分公司石油工程技术研究院,河南濮阳457001 [4]中铁四局集团第四工程有限公司,安徽合肥230041

出　　处：《实验技术与管理》2024年第7期162-168,共7页Experimental Technology and Management

基　　金：安徽省博士后研究人员科研活动经费资助项目(2023B726);2022年安徽省新建专业质量提升项目(2022xjzlts007);教育部产学合作协同育人项目(231004691085611);2022年安徽省教学研究重点项目(2022jyxm400);安徽省高等学校自然科学研究重点项目(2022AH050807);矿山建设工程安徽省高校重点实验室开放课题(CXZDSY52022107);安徽理工大学高层次引进人才科研启动基金项目(2021yjrc16)。

摘　　要：该文针对锚杆拉拔脱黏实验教学存在的问题,引入了声发射(AE)定位技术,成功将锚杆脱黏过程进行了三维可视化。文章详细探讨了AE定位技术的基础原理、关键算法、实验设置及数据处理流程,详细阐述了该技术在锚杆脱黏监测中的应用方法,验证了AE定位技术在锚杆拉拔脱黏实验教学中的有效性。该实验课程不仅丰富了土木工程专业的实验教学内容,而且通过结合前沿监测技术,展示了跨学科技术整合在解决复杂工程问题中的重要作用。这一教学案例促进了学生对工程实际问题复杂性的理解,激发了他们对探索未知领域的兴趣,引导他们进行创新性思考。[Objective]Traditional bolt pull-out experiments are essential in civil engineering education,providing essential insights into the performance and reliability of bolt support systems.However,these experiments typically yield only load-displacement curves,which,while useful,fail to offer a comprehensive understanding of the experimental process or the complex nature of the bolt support failure process.To better prepare students for real-world engineering challenges and understand bolt behavior under stress,it is necessary to advance the teaching methodology within civil engineering education.[Methods]This article introduces an improved acoustic emission(AE)localization algorithm incorporating the Geiger method,adapted through the least squares approach to enhance the analysis of bolt support systems.The enhancement of the AE algorithm allows for a more nuanced interpretation of AE signals,providing a clearer understanding of crack distribution and expansion.This new approach is particularly valuable for assessing bolt support performance in civil engineering structures,where early failure detection can prevent catastrophic outcomes.To validate the refined AE localization algorithm,an indoor experiment was conducted using cement mortar as a simulant for bolt pull-out analog specimens.Cement mortar was chosen owing to its homogeneity and environment that closely replicates real-world bolt support conditions.[Results]Students involved in the experiment gain a thorough understanding of AE positioning principles and hands-on experience in its operation.By participating in the design and execution of the experiment and through the analysis of experimental results,students deepen their understanding of the physical phenomena behind anchorage pulling and debonding.The educational process also encompasses practical aspects of sensor arrangement,data acquisition,and result interpretation,essential skills for their future academic and professional pursuits.The active involvement in experimental design,implementation,and ana

关 键 词：AE定位 锚杆拉拔 脱黏过程 实验教学 三维可视化 

分 类 号：TU45[建筑科学—岩土工程]